iTunes
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We used iTunes to convert an uncompressed .wav file into a high-quality (160 Kbps) MP3 file, and checked how many seconds each CPU took to perform this operation. Therefore, the results below are given in seconds, so the lower the number the better.
On MP3 conversion, the Core i7-3960X was 9.4% faster than the Core i7-990X and 31.3% faster than the AMD FX-8150.
